• Upgrade to HTD Style Belt: Convert your 6gpm and 12 gpm mechanical pumps to HTD style belts. • Optimal Compatibility: Compatible with 1/2' drive shaft with 1/8' key and multiple HTD style drive pulley options. • Wide Range of Ratios: HTD Drive Pulleys for 50% - 71% Drive Ratios available. Part Number 21123 Pulley, HTD, 5M, 56-tooth, 1/2-inch Bore. Designed for 5M pitch, 15mm wide HTD drive belt. 56 tooth driven pulley for installation on pump. For use with Part Number 11105 and 11107 Belt Drive Fuel Pumps. This product is not legal for sale or use on emission-controlled vehicles except when used as a direct replacement part matching OEM specifications. HTD Drive Pulley options for 1' drive mandrel available: click here.

This Aeromotive pulley is perfect for those looking to upgrade their mechanical pumps. It's suitable for users working with 6gpm and 12 gpm mechanical pumps. You can use it to convert your pumps to HTD style belts, making your pumping system more efficient. The pulley has a 1/2-inch bore and 56 teeth, and it's designed for a 5M pitch, 15mm wide HTD drive belt. It also offers a range of drive ratios from 50% - 71% to optimize pump speed according to your engine RPM.